Enabled the admin by default.

Everyone uses the admin.
Disabled the sites framework by default.

RequestSite does the job for single-domain websites.
Removed settings related to email reporting.

While handy for small scale projects, it isn't exactly a best practice.
Removed STATICFILES/TEMPLATES_DIRS from default settings file.

The current best practice is to put static files and templates in
applications, for easier testing and deployment.
Removed STATICFILES_FINDERS/TEMPLATE_LOADERS from default settings file.

Only developers with special needs ever need to change these settings.
Avoided misleading TEMPLATE_DEBUG = DEBUG.

According to the docs TEMPLATE_DEBUG works only when DEBUG = True.
Reorganized settings in logical sections, and trimmed comments.
Enabled clickjacking protection by default.
Enabled the locale middleware by default.

USE_I18N is True by default, and doesn't work well without
LocaleMiddleware.
Moved logging config for email notifications of 500 error in the docs.